JPS59188307A - Enclosed switchboard - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention This invention installs a plurality of electrical devices stacked in multiple stages within a panel main body, and stores conductors connected to each electrical device within the panel main body to form circuits in multiple stages. Regarding the constructed closed switchboard, even if an arc accident occurs in any room of each stage circuit, the expanded air in that room is effectively discharged outside the panel, and the purpose is to prevent the accident from spreading to other rooms.

2. Description of the Related Art Conventionally, a closed power distribution board that accommodates electrical equipment such as a plurality of circuit breakers in multiple stacks has been configured as shown in FIG. 1, for example, in the case of two stacks. In other words, the casing-like board body (1)
Inside each separator (2) 9 (3) 9 (4),
(5) divided into the frontmost low pressure chamber (6), the upper front upper equipment room (7), the lower front lower equipment room (8),
A central busbar room (9) and a rear cable room 00 are formed, and a three-phase disconnect bushing (lla) is installed on the rear wall of the upper equipment room (7) to introduce the busbar room (9) and cable room αO, respectively. and (llb) are installed through the rear wall of the lower equipment room (8), and three-phase disconnection bushings (
12a) and (12b) are installed through, and both equipment rooms (7)
The circuit breakers 0j and 04) which are housed in the disconnector bushings (lla) and (lla) and (lla) and (8) in a freely drawable manner are respectively
b), (12a), and (12b).

In addition, a three-phase bus a is introduced into the bus room (9), and this is connected to the disconnection section bushings (lla) and (12a) introduced into the bus room (9), respectively, and the cable room 00 The cable 00 and the α force are connected to the disconnection bushings (llb) and (12b) introduced into the cable room 00 via the current transformer (g) and the 0 side, respectively, and the cable (lla
).

Upper circuit leading to cable 0 through circuit breaker 0, disconnection bushing (llb) and current transformer α8), and bus 0
0 to the disconnector bushing (12a), circuit breaker 04),
A lower circuit is configured that extends to the cable αη via the disconnecting bushing (12b) and the current transformer 00.

Furthermore, the top plate of the panel body (1) is provided with transparent pressure relief ports that communicate with the low pressure chamber (6), upper equipment chamber (7), and cable α0), which are connected to the rotatable pressure relief plates (
(b), which is closed so that it can be opened and closed freely, and when an arc accident occurs, the expanded air opens each pressure relief plate to open the pressure relief port, and the expanded air is discharged from the pressure relief port to suppress the increase in internal pressure. There are many people. In FIG. 1, (2υ is the front leg, (A) is the rear cover, and (C) is the zero-phase current transformer.

However, according to the conventional closed switchboard, the panel body (1)
Each room facing the top plate (6)? (7), (10)
If an internal arc accident occurs, the expanded air can be directly discharged outside the panel from the pressure relief port, but for rooms other than those mentioned above.

That is, in the lower equipment room (8) and the busbar room (9), there are many effective pressure relief paths for excessive internal pressure rise when an arc accident occurs, resulting in the accident spreading to other rooms.

This invention was made with the above points in mind,
A plurality of electrical devices are stacked and installed in multiple stages within a housing-like panel main body, and conductors connected to each of the electrical devices are housed in the panel main body to form a circuit in multiple stages, and each of the stages The circuit is divided by a separator, and a busbar room, an equipment room for the electrical equipment, and a cable room are formed independently in each stage, and a pressure relief box is installed adjacent to the side of the panel body. The present invention provides a closed power distribution board characterized in that a pressure relief path for each chamber of the circuit other than at least the top stage is formed via a side plate of the board main body and the pressure relief box.

Therefore, according to the closed distribution and power board of the present invention, if an internal arc accident occurs in each chamber of the circuit other than the top stage, the expanded air due to the internal arc accident will be transferred to the outside through the side plate of the panel body and the pressure relief box. In addition, in the event of an internal arc accident in each chamber of the top circuit, the internally expanded air will be discharged to the outside through the top plate of the panel body or the side plate of the panel body and the pressure relief box. Even if an arc accident occurs in any chamber in the main body of the panel, the sudden increase in internal pressure in that chamber can be effectively relieved without affecting other chambers, preventing the accident from occurring in other chambers. It is possible to prevent spillover.

Next, this invention will be explained in detail with reference to the drawings from FIG. 2 onwards showing embodiments thereof.

First, FIGS. 2 to 5 showing one embodiment will be explained.

In these drawings, (c) is a casing-like board body, (c) is a horizontal separator that divides the inside of the board body (goods) into upper and lower stages, (26a), (27a), and (26b), (
, 27b) are the front equipment chambers (28a) and (28b) and the central busbar chambers (29a) and (29b) in the upper and lower tiers of the panel body (1).

It is a separation plate that independently forms the rear cable chambers (30a) and (30b), and the right side plate of the panel body (c) has both bus bar chambers (29a) and (
29b) is provided with a transparent window communicating therewith. (31a)
and (32a) are an upper disconnection part bushing and a lower disconnection part bushing, (31b ) and (32
b) is installed through the lower separation plate (26b) and houses the equipment room (28b), busbar room (29b), and cable room (3), respectively.
0b) and an upper disconnection section bushing and a lower disconnection section bushing.

(33a) and (33b) are the upper and lower equipment rooms (28a).
) and (28b), respectively, and are installed in the upper disconnecting section bushings (31a), (31b) and the lower disconnecting section bushings (32a), (32b) respectively, and are detachable and detachable circuit breakers, (34a), (34b). ) are busbars of 3 phases in the left and right direction stored in the upper and lower busbar chambers (29a) and (29b) and arranged in parallel in the front and rear direction;
4a) and (34b) are respectively connected to the upper disconnection bushings (31a) and (31b) for each phase. (35a), (35t]) are for each cable room in the upper and lower tiers (
current transformers (3oa) and (30b) respectively.
6a), (36b) to each lower disconnection section bushing (32a), (32b), and each cable (35a), (35b) has a respective cable chamber (30a), (30b). Zero-phase current transformers (37a) and (37b) are attached at the bottom of the. In addition, the cable (35a) in the upper cable room (30a)
is introduced through the lower cable room (3Qb),
The cable (35a) is located in the lower cable room (30b)
It is separated from the cable room (30b) by a partition wall (c). In addition, in the upper and lower stages in the panel main body (c), upper disconnection bushings (31a), (31b), circuit breakers (33a),
(33b), lower disconnection bushing (32a), (32
b) and current transformers (36a) and (36b), respectively, to the cape (35a) and (35b).

(39a) and (39b) are the upper and lower equipment rooms (28a)
), (28b) are doors that can be opened and closed at will, and (40a) and (40b) are for the upper and lower cable rooms (
30a), (30b) A cover that can open and close the rear opening, Ql), (/42, Q■ is the panel body (
Each room (28a), (29a), (30a) on the top plate of
Pressure relief plates (2) and (C) are transparently installed on the right side plate of the panel body (C) and are connected to the lower equipment room (28b) and the cable room (28b), respectively. 3
The pressure relief port communicating with Qb), 06) and 0 are the panel body (
This is a pressure relief plate that is screwed to the right side plate of the vehicle and closes the pressure relief port 04) and the pressure relief port 04) respectively.

(Foundation) is a pressure relief box with an opening on the left side and installed adjacent to the right side of the panel body ■, Q9) j fi is the first pressure relief chamber (51 ) is a partition plate that divides the second pressure relief chamber (6) in the center and the third pressure relief chamber (A) in the rear, and the first pressure relief chamber (5υ is the two-sided chamber ( 28a).

(28b), the second pressure relief chamber 6 communicates with both busbar chambers (29a) and (29b), and the third pressure relief chamber complex communicates with both cable chambers (30a) and (30b).
located corresponding to the pressure plate 0 on the right side of the main body (c)
6), θ force is the first. Third pressure relief chamber (51),
Facing S3. (Foundation), f4゜(F) is a pressure relief plate that can open and close the pressure relief ports that are transparently installed in the top plate of the pressure relief box (Foundation) and communicate with each pressure relief chamber (5υ, 6e, H). 6″/
) is provided vertically in almost the upper half of the second pressure relief chamber q52, and both busbars (29aL and 29b) are introduced into the second pressure relief chamber 6 through the respective windows. 34a
), (34b) is a connection bus bar that connects the ends of.

If an internal arc accident occurs in the upper equipment room (28a), busbar room (29a), or cable room (30a) of the panel main body (c), the sudden increase in internal pressure will cause the As shown by the two-dot chain line, the pressure relief plate θ, the pressure relief plate 0, or the pressure relief plate 63) is rotated to open the pressure relief port, and the expanded air is discharged outside the panel through the pressure relief port, and the air is discharged indoors. pressure rise is suppressed to a low value.

In addition, if an internal arc accident occurs in the lower equipment room (28b) or cable room (30b) of the panel body (c), a sudden increase in internal pressure will cause pressure relief plate Q6) or pressure relief plate Q? ) is blown away, the pressure relief port θ→ or the pressure relief port (c) opens, and the expanded air passes through the pressure relief port 0→ into the first pressure relief chamber (5]) or through the pressure relief port 00. and flows into the third pressure relief chamber G→, and the pressure relief plate or pressure relief plate ring is rotated to open the pressure relief port of the first pressure relief chamber 01) or the third pressure relief chamber (A). However, the inflowing expanded air is discharged to the outside of the panel through the pressure relief port, and the increase in pressure inside the room is suppressed to a low value.

Furthermore, if an internal arc accident occurs in the lower busbar room (29b), the expanded air will pass through the window on the right side of the busbar room (29b) to the second pressure relief chamber G of the pressure relief box. At the same time, the pressure relief plate (a) of the second pressure relief chamber 1!52 is rotated to open the pressure relief port, and the expanded air that has flowed in is discharged outside the panel through the pressure relief port. As a result, the pressure increase in the busbar chamber (29b) is suppressed to a low value.

Therefore, according to the above embodiment, even if an internal arc accident occurs in any chamber in the panel body (c) and the internal pressure rises rapidly, the expanded air can be effectively channeled to the outside without affecting other chambers. It can be discharged and prevent accidents from spreading.

In the above embodiment, the pressure relief paths for the upper chambers (28a), (29a), and (30a) of the panel body (C) are formed through the pressure relief ports in the top plate of the panel body (1). However, the expanded air inside the room was directly and effectively discharged outside the panel.
Connect this to each lower room (28b), (29b), (3ob)
Similarly to the pressure relief path, each pressure relief chamber (5υ, 6
It may also be formed through (a).

Further, in the above embodiment, a case is shown in which one board body (c) is used, but the present invention is not limited to this, and the same can be applied to a case where a plurality of board bodies (goods) are arranged side by side. In other words, when two board bodies (goods) are installed side by side, as shown in Figure 6, a pressure relief box 0 mark with openings on both left and right sides is installed adjacently between the two board bodies. As shown by the arrows in the figure, both boards
The pressure relief path for each of the upper chambers may be formed through the pressure relief port of the top plate, and the pressure relief path for each lower chamber may be formed through the pressure relief box 0 barrel. Furthermore, when arranging 3 and 4 board bodies ■ in a row, the
The structure may be configured as shown in the figure, and the same can be done in the case of five or more units.

By the way, the above example shows the case where the circuits are housed in two tiers within the panel main body ■, but it can be done in the same way if the circuits are stacked in three or more tiers. The pressure relief path is connected to the pressure relief box (
It can be formed through financial institutions (goods).

[Brief explanation of the drawing]

FIG. 1 is a schematic cutaway side view of a conventional closed switchboard, and FIG. 2 and the following drawings show an embodiment of the closed switchboard of the present invention.
5 to 5 show one embodiment, FIG. 2 is a cutaway side view of the panel body, FIG. 3 is a cutaway side view with a pressure relief box installed adjacent to the side of the panel body, and FIG. 4 is a cutaway side view of the panel body. 5 is a partially cutaway exploded perspective view, and FIG. 5 is a partially cutaway front view taken along line A- and Th in FIG. 3.
6, 7, and 8 are schematic front views of other embodiments, respectively. ■--Panel body, (c) Separation plate, (28a), (
28b)...Equipment room, (29a), (29b) = bus room, (30a), (30b) = cable room, (33
a), (33b), , circuit breaker, (34a), (34
b) -Bus bar, (35a), (35b)...cable, θ→, ni)...pressure outlet, θ6), θf...pressure plate,
(Foundation)...Pressure box. Agent: Patent Attorney Ryutabe Fujita

Claims (1)

[Claims] ■ A plurality of electrical devices are stacked and installed in multiple stages within a housing-like panel body, and conductors connected to each of the electrical devices are housed in the panel body to form a circuit in multiple stages, and each of the electrical devices is stacked in multiple stages. The circuits of the tiers are divided by separators, and a busbar room, an equipment room for the electrical equipment, and a cable room are independently formed in each tier, and a pressure relief box is installed adjacent to the side of the panel body. In addition, a closed power distribution board characterized in that a pressure relief path for each chamber of the circuit other than at least the top stage is formed via a side plate of the board body and the pressure relief box.